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Preparation method and application of composite oxygen evolution electrode of self-supporting iron oxyhydroxide and iron-doped nickel selenide

A technology of iron oxyhydroxide and oxygen evolution electrode, which is applied in the direction of electrodes, electrolysis process, electrolysis components, etc. It can solve the problems of weak bonding between catalytic components and matrix materials, increasing the complexity of raw material components, and affecting the stability of catalytic electrodes. , to achieve the effect of low raw material price, strong binding force and reduced preparation cost

Inactive Publication Date: 2021-06-18
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the introduction of iron ions from the outside, the degree of bonding between the catalytic components and the matrix material is weak during the growth process, which directly affects the stability of the catalytic electrode for long-term use, and it is difficult to meet the needs of industrial applications.
In addition, due to problems such as lattice dislocation, the catalytic performance is reduced, and the additional introduction of iron ions increases the complexity of the raw material components.

Method used

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  • Preparation method and application of composite oxygen evolution electrode of self-supporting iron oxyhydroxide and iron-doped nickel selenide
  • Preparation method and application of composite oxygen evolution electrode of self-supporting iron oxyhydroxide and iron-doped nickel selenide
  • Preparation method and application of composite oxygen evolution electrode of self-supporting iron oxyhydroxide and iron-doped nickel selenide

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Effect test

Embodiment 1

[0034]A composite oxygen evolution electrode of self-supporting iron oxyhydroxide and iron-doped nickel selenide was prepared by using nickel-iron foam with a mass ratio of iron:nickel of 3:7 as the base material:

[0035] (1) The above-mentioned base material is washed in an ultrasonic generator using 2mol / L hydrochloric acid aqueous solution, acetone, and water respectively, and then placed in absolute ethanol and fed with nitrogen;

[0036] (2) Dissolving the mixture of selenium powder and sodium borohydride with deionized water, injecting the obtained aqueous solution into the absolute ethanol described in step (1), and performing a hydrothermal reaction at 140° C. for 12 hours.

[0037] (3) After the hydrothermal reaction was completed, the ferronickel foam was taken out, the surface was cleaned with ethanol and deionized water, and dried in air to obtain a self-supporting composite oxygen evolution electrode of iron oxyhydroxide and iron-doped nickel selenide.

[0038] T...

Embodiment 2

[0041] The difference from Example 1 is that ferronickel foam with a mass ratio of iron:nickel of 5:5 is used as the base material.

Embodiment 3

[0043] The difference from Example 1 is that ferronickel foam with a mass ratio of iron:nickel of 9:1 is used as the base material.

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Abstract

The invention discloses a preparation method and application of a composite oxygen evolution electrode of self-supporting iron oxyhydroxide and iron-doped nickel selenide, and belongs to the technical field of hydrogen and oxygen preparation through water electrolysis. The method comprises the following steps: (1) placing foamed ferronickel in absolute ethyl alcohol; and (2) dissolving selenium powder and sodium borohydride in deionized water to obtain an aqueous solution, mixing the aqueous solution with the solution obtained in the step (1), and preparing the nano catalytic oxygen evolution electrode with the self-supporting structure by utilizing a hydrothermal reaction process. The technical method and the synthesis process are simple, the raw materials are low in price, and the prepared self-supporting iron-nickel-selenium ternary composite oxygen evolution electrode is used for preparing hydrogen and oxygen by electrolyzing a potassium hydroxide aqueous solution and is high in oxygen evolution activity.

Description

technical field [0001] The invention belongs to the technical field of producing hydrogen and oxygen by electrolyzing water, in particular to a preparation method and application of a self-supporting composite oxygen evolution electrode of iron oxyhydroxide and iron-doped nickel selenide. Background technique [0002] Facing the rapid growth of the world's energy demand, the current fossil fuels as the main energy are not only limited in total, but also cause environmental problems such as greenhouse effect and air pollution. Human beings urgently need to develop a green and clean energy to replace fossil fuels. Hydrogen is considered to be a very potential energy carrier in the future because of its high calorific value, wide range of sources, and non-polluting combustion reaction products. However, at present, most of the hydrogen comes from the reforming process of natural gas or coal or petroleum, which produces a large amount of environmental pollutants. Therefore, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/031C25B11/054C25B11/061C25B11/091C25B1/04C25B9/00
CPCC25B1/04C25B9/00Y02E60/36
Inventor 王保国林育群王培灿
Owner TSINGHUA UNIV
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